android - not able to extract the drawing cache with overlayed bitmap images -

i trying save canvas on sdcard. drawing 2 bitmaps (one on top of another) in ondraw(canvas canvas) method. when save file, bottom layered bitmap stored. posting code ondraw method here:

    paint paint = new paint();     paint.setcolor(color.black);      //rectangle first image     rct = new rect(10, 10, canvas.getwidth(), canvas.getheight());      // rectangle second image, secong image drawn user touches screen     new_image = new rectf(touchx, touchy, touchx + secondbitmap.getwidth(),                 touchy + secondbitmap.getheight());     //this bitmap drawn first     canvas.drawbitmap(firstbitmap, null, rct, paint);      //this bitmap drawn on top of first bitmap on user touch     canvas.drawbitmap(secondbitmap, null, new_image, paint);      canvas.save(); 

the code saving canvas on sdcard written on mainactivity is:

   bitmap bm = canvas.getdrawingcache() // canvas in object of class extended view    string path = environment.getexternalstoragedirectory()             .getabsolutepath();    boolean exists = (new file(path)).exists();     outputstream outstream = null;    file file = new file(path, "drawn_image" + ".jpg");     try {       outstream = new fileoutputstream(file);       bmp.compress(bitmap.compressformat.jpeg, 100, outstream);       outstream.flush();       outstream.close();       }     catch (filenotfoundexception e) {     e.printstacktrace();     }     catch (ioexception e) {         e.printstacktrace();     } 

the problem base image(firstbitmap of ondraw() method) saved on sdcard instead of entire canvas(with both images). new canvas...so appreciated

when getdrawingcache() called invalidates view full cache. debug code , check if going through each , every line of ondraw() method in view.